Connected to the backend

-Connected to backend using retrofit
-Added TokenManager and AuthInterceptor for the application to login and make calls with authentication to access some backend calls that need authentication

app/build.gradle.kts

@@ -36,6 +36,12 @@ dependencies {
     implementation(libs.material)
     implementation(libs.activity)
     implementation(libs.constraintlayout)
+
+    implementation("com.squareup.retrofit2:retrofit:2.9.0")
+    implementation("com.squareup.retrofit2:converter-gson:2.9.0")
+    implementation("com.squareup.okhttp3:logging-interceptor:4.9.1")
+    implementation("com.squareup.okhttp3:okhttp:4.12.0")
+
     implementation("com.google.android.material:material:1.11.0")
     implementation("androidx.viewpager2:viewpager2:1.1.0")
     implementation("com.google.android.material:material:1.11.0")

app/src/main/AndroidManifest.xml

@@ -2,6 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission
         android:name="android.permission.READ_EXTERNAL_STORAGE"
@@ -13,6 +14,7 @@
         android:required="false" />
 
     <application
+        android:networkSecurityConfig="@xml/network_security_config"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"

app/src/main/java/com/example/petstoremobile/activities/MainActivity.java

@@ -2,6 +2,7 @@ package com.example.petstoremobile.activities;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.util.Log;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
@@ -14,7 +15,16 @@ import androidx.core.view.ViewCompat;
 import androidx.core.view.WindowInsetsCompat;
 
 import com.example.petstoremobile.R;
+import com.example.petstoremobile.api.Auth.AuthApi;
+import com.example.petstoremobile.api.Auth.TokenManager;
+import com.example.petstoremobile.api.RetrofitClient;
+import com.example.petstoremobile.dtos.AuthDTO;
 
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+//The login screen activity
 public class MainActivity extends AppCompatActivity {
 
     private EditText etUser;
@@ -56,17 +66,47 @@ public class MainActivity extends AppCompatActivity {
                 return;
             }
 
-            //check if username and password are correct TODO: Replace with actual login
-            if (username.equals("admin") && password.equals("admin")) {
-                Intent intent = new Intent(this, HomeActivity.class);
-                startActivity(intent);
-                Toast.makeText(this, "Login successful", Toast.LENGTH_SHORT).show();
-                finish();
-            }
-            else {
-                Toast.makeText(this, "Login failed", Toast.LENGTH_SHORT).show();
-                tvLoginStatus.setText("Login failed");
-            }
+            AuthApi authApi = RetrofitClient.getAuthApi(this);
+
+            //Call login from api and get response
+            authApi.login(new AuthDTO.LoginRequest(username,password)).enqueue(new Callback<AuthDTO.LoginResponse>() {
+                @Override
+                public void onResponse(Call<AuthDTO.LoginResponse> call, Response<AuthDTO.LoginResponse> response) {
+                    if (response.isSuccessful() && response.body() != null) {
+                        //save login data in shared preferences
+                        TokenManager.getInstance(MainActivity.this).saveLoginData(
+                                response.body().getToken(),
+                                response.body().getUsername(),
+                                response.body().getRole()
+                        );
+                        //go to home activity after login
+                        Intent intent = new Intent(MainActivity.this, HomeActivity.class);
+                        startActivity(intent);
+                        Toast.makeText(MainActivity.this, "Login successful", Toast.LENGTH_SHORT).show();
+                        finish();
+                    } else {
+//                        Toast.makeText(MainActivity.this, "Login failed", Toast.LENGTH_SHORT).show();
+//                        tvLoginStatus.setText("Login failed");
+
+                        try {
+                            String errorBody = response.errorBody().string();
+                            Log.e("LOGIN", "Code: " + response.code() + " Error: " + errorBody);
+                        } catch (Exception e) {
+                            Log.e("LOGIN", "Code: " + response.code());
+                        }
+                        Toast.makeText(MainActivity.this,
+                                "Login failed: " + response.code(),
+                                Toast.LENGTH_SHORT).show();
+                        tvLoginStatus.setText("Login failed: " + response.code());
+                    }
+                }
+
+                @Override
+                public void onFailure(Call<AuthDTO.LoginResponse> call, Throwable t) {
+                    Toast.makeText(MainActivity.this, "Login failed", Toast.LENGTH_SHORT).show();
+                    tvLoginStatus.setText("Login failed");
+                }
+            });
         });
     }
 }

app/src/main/java/com/example/petstoremobile/api/Auth/AuthApi.java

@@ -0,0 +1,13 @@
+package com.example.petstoremobile.api.Auth;
+
+import com.example.petstoremobile.dtos.AuthDTO;
+
+import retrofit2.Call;
+import retrofit2.http.Body;
+import retrofit2.http.POST;
+
+//Api for logging in
+public interface AuthApi {
+    @POST("v1/auth/login")
+    Call<AuthDTO.LoginResponse> login(@Body AuthDTO.LoginRequest loginRequest);
+}

app/src/main/java/com/example/petstoremobile/api/Auth/AuthInterceptor.java

@@ -0,0 +1,38 @@
+package com.example.petstoremobile.api.Auth;
+
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+
+import java.io.IOException;
+
+import okhttp3.Interceptor;
+import okhttp3.Request;
+import okhttp3.Response;
+
+//Used to get the token from the backend for authenticated api calls
+public class AuthInterceptor implements Interceptor {
+
+    private final TokenManager tokenManager;
+
+    public AuthInterceptor(Context context) {
+        this.tokenManager = TokenManager.getInstance(context);
+    }
+
+    @NonNull
+    @Override
+    public Response intercept(@NonNull Chain chain) throws IOException {
+        String token = tokenManager.getToken();
+
+        //If we have a token then add it to the request
+        if (token != null) {
+            Request request = chain.request().newBuilder()
+                    .addHeader("Authorization", "Bearer " + token)
+                    .build();
+            return chain.proceed(request);
+        }
+
+        //If no token then just pass the request
+        return chain.proceed(chain.request());
+    }
+}

app/src/main/java/com/example/petstoremobile/api/Auth/TokenManager.java

@@ -0,0 +1,60 @@
+package com.example.petstoremobile.api.Auth;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+//Store login token in shared preferences
+public class TokenManager {
+    private static final String TOKEN_KEY = "token";
+    private static final String USERNAME_KEY = "username";
+    private static final String ROLE_KEY = "role";
+    private static final String PREFS_NAME = "auth_prefs";
+
+    private static TokenManager instance;
+    private SharedPreferences prefs;
+
+    private TokenManager(Context context) {
+        prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+    }
+
+    public static TokenManager getInstance(Context context) {
+        if (instance == null) {
+            instance = new TokenManager(context);
+        }
+        return instance;
+    }
+
+    //save login data after login
+    public void saveLoginData(String token, String username, String role) {
+        prefs.edit()
+                .putString(TOKEN_KEY, token)
+                .putString(USERNAME_KEY, username)
+                .putString(ROLE_KEY, role)
+                .apply();
+    }
+
+    //Getters
+    public String getToken() {
+        return prefs.getString(TOKEN_KEY, null);
+    }
+
+    public String getUsername() {
+        return prefs.getString(USERNAME_KEY, null);
+    }
+
+    public String getRole() {
+        return prefs.getString(ROLE_KEY, null);
+    }
+
+    //Check if logged in
+    public boolean isLoggedIn() {
+        return getToken() != null;
+    }
+
+    //Clear login data
+    public void clearLoginData() {
+        prefs.edit().clear().apply();
+    }
+
+
+}

app/src/main/java/com/example/petstoremobile/api/PetApi.java

@@ -0,0 +1,39 @@
+package com.example.petstoremobile.api;
+
+import com.example.petstoremobile.dtos.PageResponse;
+import com.example.petstoremobile.dtos.PetDTO;
+
+import retrofit2.Call;
+import retrofit2.http.Body;
+import retrofit2.http.DELETE;
+import retrofit2.http.GET;
+import retrofit2.http.POST;
+import retrofit2.http.PUT;
+import retrofit2.http.Path;
+import retrofit2.http.Query;
+
+public interface PetApi {
+    // Get all pets
+    @GET("v1/pets")
+    Call<PageResponse<PetDTO>> getAllPets(
+            @Query("page") int page,
+            @Query("size") int size
+    );
+
+    // Get pet by id
+    @GET("v1/pets/{id}")
+    Call<PetDTO> getPetById(@Path("id") Long id);
+
+    // Create pet
+    @POST("v1/pets")
+    Call<PetDTO> createPet(@Body PetDTO pet);
+
+    // Update pet
+    @PUT("v1/pets/{id}")
+    Call<PetDTO> updatePet(@Path("id") Long id, @Body PetDTO pet);
+
+    // Delete pet
+    @DELETE("v1/pets/{id}")
+    Call<Void> deletePet(@Path("id") Long id);
+
+}

app/src/main/java/com/example/petstoremobile/api/RetrofitClient.java

@@ -0,0 +1,57 @@
+package com.example.petstoremobile.api;
+
+import android.content.Context;
+
+import com.example.petstoremobile.api.Auth.AuthApi;
+import com.example.petstoremobile.api.Auth.AuthInterceptor;
+
+import okhttp3.OkHttpClient;
+import okhttp3.logging.HttpLoggingInterceptor;
+import retrofit2.Retrofit;
+import retrofit2.converter.gson.GsonConverterFactory;
+
+public class RetrofitClient {
+    //base URL
+    public static final String BASE_URL = "http://10.0.2.2:8080/api/"; //for emulator testing change to computer ip if using hardware to test
+
+
+    private static Retrofit retrofit = null;
+
+    public static Retrofit getClient(Context context) {
+        //create an http logging using an interceptor
+        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
+        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
+
+        OkHttpClient client = new OkHttpClient.Builder()
+                .addInterceptor(interceptor)
+                .addInterceptor(new AuthInterceptor(context))
+                .build();
+
+        //build the retrofit object with all needed properties
+        retrofit = new Retrofit.Builder()
+                .baseUrl(BASE_URL)
+                .addConverterFactory(GsonConverterFactory.create()) //JSON converter
+                .client(client) //logging interceptor - OkHttpClient
+                .build();
+
+        return retrofit;
+    }
+
+    //associate the retrofit object with the API interface
+    public static PetApi getPetApi(Context context) {
+        return getClient(context).create(PetApi.class);
+    }
+
+    public static ServiceApi getServiceApi(Context context) {
+        return getClient(context).create(ServiceApi.class);
+    }
+
+    public static SupplierApi getSupplierApi(Context context) {
+        return getClient(context).create(SupplierApi.class);
+    }
+
+    public static AuthApi getAuthApi(Context context) {
+        return getClient(context).create(AuthApi.class);
+    }
+
+}

app/src/main/java/com/example/petstoremobile/api/ServiceApi.java

@@ -0,0 +1,38 @@
+package com.example.petstoremobile.api;
+
+import com.example.petstoremobile.dtos.PageResponse;
+import com.example.petstoremobile.dtos.ServiceDTO;
+
+import retrofit2.Call;
+import retrofit2.http.Body;
+import retrofit2.http.DELETE;
+import retrofit2.http.GET;
+import retrofit2.http.POST;
+import retrofit2.http.PUT;
+import retrofit2.http.Path;
+import retrofit2.http.Query;
+
+public interface ServiceApi {
+    // Get all services
+    @GET("v1/services")
+    Call<PageResponse<ServiceDTO>> getAllServices(
+            @Query("page") int page,
+            @Query("size") int size
+    );
+
+    // Get service by id
+    @GET("v1/services/{id}")
+    Call<ServiceDTO> getServiceById(@Path("id") Long id);
+
+    // Create service
+    @POST("v1/services")
+    Call<ServiceDTO> createService(@Body ServiceDTO service);
+
+    // Update service
+    @PUT("v1/services/{id}")
+    Call<ServiceDTO> updateService(@Path("id") Long id, @Body ServiceDTO service);
+
+    // Delete service
+    @DELETE("v1/services/{id}")
+    Call<Void> deleteService(@Path("id") Long id);
+}

app/src/main/java/com/example/petstoremobile/api/SupplierApi.java

@@ -0,0 +1,38 @@
+package com.example.petstoremobile.api;
+
+import com.example.petstoremobile.dtos.PageResponse;
+import com.example.petstoremobile.dtos.SupplierDTO;
+
+import retrofit2.Call;
+import retrofit2.http.Body;
+import retrofit2.http.DELETE;
+import retrofit2.http.GET;
+import retrofit2.http.POST;
+import retrofit2.http.PUT;
+import retrofit2.http.Path;
+import retrofit2.http.Query;
+
+public interface SupplierApi {
+    // Get all suppliers
+    @GET("v1/suppliers")
+    Call<PageResponse<SupplierDTO>> getAllSuppliers(
+            @Query("page") int page,
+            @Query("size") int size
+    );
+
+    // Get supplier by id
+    @GET("v1/suppliers/{id}")
+    Call<SupplierDTO> getSupplierById(@Path("id") Long id);
+
+    // Create supplier
+    @POST("v1/suppliers")
+    Call<SupplierDTO> createSupplier(@Body SupplierDTO supplier);
+
+    // Update supplier
+    @PUT("v1/suppliers/{id}")
+    Call<SupplierDTO> updateSupplier(@Path("id") Long id, @Body SupplierDTO supplier);
+
+    // Delete supplier
+    @DELETE("v1/suppliers/{id}")
+    Call<Void> deleteSupplier(@Path("id") Long id);
+}

app/src/main/java/com/example/petstoremobile/dtos/AuthDTO.java

@@ -0,0 +1,28 @@
+package com.example.petstoremobile.dtos;
+
+//Used to send login data to the backend
+public class AuthDTO {
+    public static class LoginRequest {
+        private String username;
+        private String password;
+
+        public LoginRequest(String username, String password) {
+            this.username = username;
+            this.password = password;
+        }
+
+        public String getUsername() { return username; }
+        public String getPassword() { return password; }
+    }
+
+    //Used to receive login data from the backend
+    public static class LoginResponse {
+        private String token;
+        private String username;
+        private String role;
+
+        public String getToken() { return token; }
+        public String getUsername() { return username; }
+        public String getRole() { return role; }
+    }
+}

app/src/main/java/com/example/petstoremobile/dtos/PageResponse.java

@@ -0,0 +1,32 @@
+package com.example.petstoremobile.dtos;
+
+import java.util.List;
+
+//Used to get data from the API
+public class PageResponse<T> {
+    private List<T> content;
+    private int totalPages;
+    private long totalElements;
+    private int number;
+    private int size;
+    private boolean last;
+
+    public List<T> getContent() {
+        return content;
+    }
+    public int getTotalPages() {
+        return totalPages;
+    }
+    public long getTotalElements() {
+        return totalElements;
+    }
+    public int getNumber() {
+        return number;
+    }
+    public int getSize() {
+        return size;
+    }
+    public boolean isLast() {
+        return last;
+    }
+}

app/src/main/java/com/example/petstoremobile/dtos/PetDTO.java

@@ -0,0 +1,23 @@
+package com.example.petstoremobile.dtos;
+
+public class PetDTO {
+    private Long petId;
+    private String petName;
+    private String petSpecies;
+    private String petBreed;
+    private Integer petAge;
+    private String petStatus;
+    private String petPrice;
+    private String createdAt;
+    private String updatedAt;
+
+    public Long getPetId() { return petId; }
+    public String getPetName() { return petName; }
+    public String getPetSpecies() { return petSpecies; }
+    public String getPetBreed() { return petBreed; }
+    public Integer getPetAge() { return petAge; }
+    public String getPetStatus() { return petStatus; }
+    public String getPetPrice() { return petPrice; }
+    public String getCreatedAt() { return createdAt; }
+    public String getUpdatedAt() { return updatedAt; }
+}

app/src/main/java/com/example/petstoremobile/dtos/ServiceDTO.java

@@ -0,0 +1,19 @@
+package com.example.petstoremobile.dtos;
+
+public class ServiceDTO {
+    private Long serviceId;
+    private String serviceName;
+    private String serviceDesc;
+    private Integer serviceDuration;
+    private Double servicePrice;
+    private String createdAt;
+    private String updatedAt;
+
+    public Long getServiceId() { return serviceId; }
+    public String getServiceName() { return serviceName; }
+    public String getServiceDesc() { return serviceDesc; }
+    public Integer getServiceDuration() { return serviceDuration; }
+    public Double getServicePrice() { return servicePrice; }
+    public String getCreatedAt() { return createdAt; }
+    public String getUpdatedAt() { return updatedAt; }
+}

app/src/main/java/com/example/petstoremobile/dtos/SupplierDTO.java

@@ -0,0 +1,21 @@
+package com.example.petstoremobile.dtos;
+
+public class SupplierDTO {
+    private Long supId;
+    private String supCompany;
+    private String supContactFirstName;
+    private String supContactLastName;
+    private String supEmail;
+    private String supPhone;
+    private String createdAt;
+    private String updatedAt;
+
+    public Long getSupId() { return supId; }
+    public String getSupCompany() { return supCompany; }
+    public String getSupContactFirstName() { return supContactFirstName; }
+    public String getSupContactLastName() { return supContactLastName; }
+    public String getSupEmail() { return supEmail; }
+    public String getSupPhone() { return supPhone; }
+    public String getCreatedAt() { return createdAt; }
+    public String getUpdatedAt() { return updatedAt; }
+}

app/src/main/java/com/example/petstoremobile/fragments/listfragments/PetFragment.java

@@ -6,13 +6,19 @@ import androidx.fragment.app.Fragment;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageButton;
+import android.widget.Toast;
 
 import com.example.petstoremobile.R;
 import com.example.petstoremobile.adapters.PetAdapter;
+import com.example.petstoremobile.api.PetApi;
+import com.example.petstoremobile.api.RetrofitClient;
+import com.example.petstoremobile.dtos.PageResponse;
+import com.example.petstoremobile.dtos.PetDTO;
 import com.example.petstoremobile.fragments.ListFragment;
 import com.example.petstoremobile.fragments.listfragments.detailfragments.PetDetailFragment;
 import com.example.petstoremobile.fragments.listfragments.listprofilefragments.PetProfileFragment;
@@ -22,11 +28,15 @@ import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import java.util.ArrayList;
 import java.util.List;
 
-public class PetFragment extends Fragment implements PetAdapter.OnPetClickListener {
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
 
+public class PetFragment extends Fragment implements PetAdapter.OnPetClickListener {
     private List<Pet> petList = new ArrayList<>();
-    private PetAdapter adapter;
     private ImageButton hamburger;
+    private PetAdapter adapter;
+    private PetApi api;
 
     //load pet view
     @Override
@@ -34,10 +44,14 @@ public class PetFragment extends Fragment implements PetAdapter.OnPetClickListen
                              Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.fragment_pet, container, false);
 
+        //get retrofit
+        api = RetrofitClient.getPetApi(requireContext());
+
         hamburger = view.findViewById(R.id.btnHamburger);
 
-        loadPetData(); //TODO: Replace this with actual data when backend is working
         setupRecyclerView(view);
+        loadPetData(); //TODO: Replace this with actual data when backend is working
+
 
         //Add button to opens the add dialog
         FloatingActionButton fabAddPet = view.findViewById(R.id.fabAddPet);
@@ -114,15 +128,35 @@ public class PetFragment extends Fragment implements PetAdapter.OnPetClickListen
         openPetProfile(position);
     }
 
-    // Helper function to get a list of all pets (Loads hardcoded sample data for now) TODO: REPLACE THIS WITH A METHOD THAT GETS DATA FROM THE DATABASE
+    // Helper function to get a list of all pets from the backend
     private void loadPetData() {
-        petList.clear();
-        petList.add(new Pet(1, "Buddy","Dog", "Labrador",2, "Available", 500.00));
-        petList.add(new Pet(2, "Milo", "Cat", "Persian",1, "Available", 300.00));
-        petList.add(new Pet(3, "Charlie","Dog", "Golden Retriever", 3, "Available", 550.00));
-        petList.add(new Pet(4, "Luna", "Cat", "Siamese",2, "Adopted", 350.00));
-        petList.add(new Pet(5, "Max", "Dog", "Beagle",1, "Available", 450.00));
-        petList.add(new Pet(6, "Bella", "Cat", "Maine Coon",4, "Available", 400.00));
+        api.getAllPets(0, 100).enqueue(new Callback<PageResponse<PetDTO>>() {
+            @Override
+            public void onResponse(Call<PageResponse<PetDTO>> call, Response<PageResponse<PetDTO>> response) {
+                if (response.isSuccessful() && response.body() != null) {
+                    petList.clear();
+
+                    // Convert to pets
+                    List<Pet> pets = response.body().getContent()
+                            .stream()
+                            .map(Pet::new)
+                            .collect(java.util.stream.Collectors.toList());
+
+                    petList.addAll(pets);
+                    adapter.notifyDataSetChanged();
+
+                } else {
+                    Log.e("onResponse: ", response.message());
+                }
+            }
+
+            @Override
+            public void onFailure(Call<PageResponse<PetDTO>> call, Throwable t) {  // 4. here
+                Toast.makeText(getContext(),
+                        "Failed to load pets", Toast.LENGTH_SHORT).show();
+                Log.e("onFailure: ", t.getMessage());
+            }
+        });
     }
 
     //set up the recyclerview and adapter

app/src/main/java/com/example/petstoremobile/fragments/listfragments/ServiceFragment.java

@@ -6,13 +6,19 @@ import androidx.fragment.app.Fragment;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageButton;
+import android.widget.Toast;
 
 import com.example.petstoremobile.R;
 import com.example.petstoremobile.adapters.ServiceAdapter;
+import com.example.petstoremobile.api.RetrofitClient;
+import com.example.petstoremobile.api.ServiceApi;
+import com.example.petstoremobile.dtos.PageResponse;
+import com.example.petstoremobile.dtos.ServiceDTO;
 import com.example.petstoremobile.fragments.ListFragment;
 import com.example.petstoremobile.fragments.listfragments.detailfragments.ServiceDetailFragment;
 import com.example.petstoremobile.models.Service;
@@ -21,11 +27,16 @@ import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import java.util.ArrayList;
 import java.util.List;
 
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
 public class ServiceFragment extends Fragment implements ServiceAdapter.OnServiceClickListener {
 
     private List<Service> serviceList = new ArrayList<>();
     private ServiceAdapter adapter;
     private ImageButton hamburger;
+    private ServiceApi api;
 
     //load service view
     @Override
@@ -33,10 +44,11 @@ public class ServiceFragment extends Fragment implements ServiceAdapter.OnServic
                              Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.fragment_service, container, false);
 
+        api = RetrofitClient.getServiceApi(requireContext());
         hamburger = view.findViewById(R.id.btnHamburger);
 
-        loadServiceData(); //TODO: Replace this with actual data when backend is working
         setupRecyclerView(view);
+        loadServiceData();
 
         //Add button to opens the add dialog
         FloatingActionButton fabAddService = view.findViewById(R.id.fabAddService);
@@ -106,14 +118,37 @@ public class ServiceFragment extends Fragment implements ServiceAdapter.OnServic
         openServiceDetails(position);
     }
 
-    // Helper function to get a list of all services (Loads hardcoded sample data for now) TODO: REPLACE THIS WITH A METHOD THAT GETS DATA FROM THE DATABASE
+    // Helper function to get a list of all services from the backend
     private void loadServiceData() {
-        serviceList.clear();
-        serviceList.add(new Service(1, "Grooming", "Full grooming for your pet", 60, 50.00));
-        serviceList.add(new Service(2, "Vaccination", "Standard vaccinations", 30, 75.00));
-        serviceList.add(new Service(3, "Health Checkup", "Comprehensive health exam", 45, 100.00));
-        serviceList.add(new Service(4, "Pet Sitting", "Overnight stay for your pet", 1440, 40.00));
-        serviceList.add(new Service(5, "Training", "Basic obedience training session", 60, 60.00));
+        api.getAllServices(0, 100).enqueue(new Callback<PageResponse<ServiceDTO>>() {
+            @Override
+            public void onResponse(Call<PageResponse<ServiceDTO>> call, Response<PageResponse<ServiceDTO>> response) {
+                if (response.isSuccessful() && response.body() != null) {
+                    serviceList.clear();
+
+                    // Convert to services
+                    List<Service> services = response.body().getContent()
+                            .stream()
+                            .map(Service::new)
+                            .collect(java.util.stream.Collectors.toList());
+
+                    serviceList.addAll(services);
+                    adapter.notifyDataSetChanged();
+
+                } else {
+                    Log.e("onResponse: ", response.message());
+                }
+            }
+
+            @Override
+            public void onFailure(Call<PageResponse<ServiceDTO>> call, Throwable t) {
+                if (getContext() != null) {
+                    Toast.makeText(getContext(),
+                            "Failed to load services", Toast.LENGTH_SHORT).show();
+                }
+                Log.e("onFailure: ", t.getMessage());
+            }
+        });
     }
 
     //set up the recyclerview and adapter

app/src/main/java/com/example/petstoremobile/fragments/listfragments/SupplierFragment.java

@@ -6,13 +6,19 @@ import androidx.fragment.app.Fragment;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageButton;
+import android.widget.Toast;
 
 import com.example.petstoremobile.R;
 import com.example.petstoremobile.adapters.SupplierAdapter;
+import com.example.petstoremobile.api.RetrofitClient;
+import com.example.petstoremobile.api.SupplierApi;
+import com.example.petstoremobile.dtos.PageResponse;
+import com.example.petstoremobile.dtos.SupplierDTO;
 import com.example.petstoremobile.fragments.ListFragment;
 import com.example.petstoremobile.fragments.listfragments.detailfragments.SupplierDetailFragment;
 import com.example.petstoremobile.models.Supplier;
@@ -21,11 +27,16 @@ import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import java.util.ArrayList;
 import java.util.List;
 
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
 public class SupplierFragment extends Fragment implements SupplierAdapter.OnSupplierClickListener {
 
     private List<Supplier> supplierList = new ArrayList<>();
     private SupplierAdapter adapter;
     private ImageButton hamburger;
+    private SupplierApi api;
 
     //load supplier view
     @Override
@@ -33,10 +44,11 @@ public class SupplierFragment extends Fragment implements SupplierAdapter.OnSupp
                              Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.fragment_supplier, container, false);
 
+        api = RetrofitClient.getSupplierApi(requireContext());
         hamburger = view.findViewById(R.id.btnHamburger);
 
-        loadSupplierData(); //TODO: Replace this with actual data when backend is working
         setupRecyclerView(view);
+        loadSupplierData();
 
         //Add button to opens the add dialog
         FloatingActionButton fabAddSupplier = view.findViewById(R.id.fabAddSupplier);
@@ -107,14 +119,37 @@ public class SupplierFragment extends Fragment implements SupplierAdapter.OnSupp
         openSupplierDetails(position);
     }
 
-    // Helper function to get a list of all suppliers (Loads hardcoded sample data for now) TODO: REPLACE THIS WITH A METHOD THAT GETS DATA FROM THE DATABASE
+    // Helper function to get a list of all suppliers from the backend
     private void loadSupplierData() {
-        supplierList.clear();
-        supplierList.add(new Supplier(1, "Pet Food Co.", "John", "Doe", "john@petfood.com", "123-456-7890"));
-        supplierList.add(new Supplier(2, "Toy Kingdom", "Jane", "Smith", "jane@toykingdom.com", "987-654-3210"));
-        supplierList.add(new Supplier(3, "HealthPet", "Robert", "Brown", "robert@healthpet.com", "555-0199-234"));
-        supplierList.add(new Supplier(4, "Groomers Choice", "Emily", "Davis", "emily@groomers.com", "444-555-6666"));
-        supplierList.add(new Supplier(5, "Birdy Haven", "Michael", "Wilson", "michael@birdyhaven.com", "111-222-3333"));
+        api.getAllSuppliers(0, 100).enqueue(new Callback<PageResponse<SupplierDTO>>() {
+            @Override
+            public void onResponse(Call<PageResponse<SupplierDTO>> call, Response<PageResponse<SupplierDTO>> response) {
+                if (response.isSuccessful() && response.body() != null) {
+                    supplierList.clear();
+
+                    // Convert to suppliers
+                    List<Supplier> suppliers = response.body().getContent()
+                            .stream()
+                            .map(Supplier::new)
+                            .collect(java.util.stream.Collectors.toList());
+
+                    supplierList.addAll(suppliers);
+                    adapter.notifyDataSetChanged();
+
+                } else {
+                    Log.e("onResponse: ", response.message());
+                }
+            }
+
+            @Override
+            public void onFailure(Call<PageResponse<SupplierDTO>> call, Throwable t) {
+                if (getContext() != null) {
+                    Toast.makeText(getContext(),
+                            "Failed to load suppliers", Toast.LENGTH_SHORT).show();
+                }
+                Log.e("onFailure: ", t.getMessage());
+            }
+        });
     }
 
     //set up the recyclerview and adapter

app/src/main/java/com/example/petstoremobile/models/Pet.java

@@ -1,5 +1,7 @@
 package com.example.petstoremobile.models;
 
+import com.example.petstoremobile.dtos.PetDTO;
+
 public class Pet {
     private int petId;
     private String petName;
@@ -20,6 +22,17 @@ public class Pet {
         this.petPrice = petPrice;
     }
 
+    //contructor to convert PetDTO to Pet
+    public Pet(PetDTO dto) {
+        this.petId = dto.getPetId().intValue();
+        this.petName = dto.getPetName();
+        this.petSpecies = dto.getPetSpecies();
+        this.petBreed = dto.getPetBreed();
+        this.petAge = dto.getPetAge();
+        this.petStatus = dto.getPetStatus();
+        this.petPrice = Double.parseDouble(dto.getPetPrice());
+    }
+
     //getter and setters
     public int getPetId() {
         return petId;

app/src/main/java/com/example/petstoremobile/models/Service.java

@@ -1,5 +1,7 @@
 package com.example.petstoremobile.models;
 
+import com.example.petstoremobile.dtos.ServiceDTO;
+
 public class Service {
     private int serviceId;
     private String serviceName;
@@ -16,15 +18,19 @@ public class Service {
         this.servicePrice = servicePrice;
     }
 
+    public Service(ServiceDTO dto) {
+        this.serviceId = dto.getServiceId().intValue();
+        this.serviceName = dto.getServiceName();
+        this.serviceDesc = dto.getServiceDesc();
+        this.serviceDuration = dto.getServiceDuration();
+        this.servicePrice = dto.getServicePrice();
+    }
+
     //getter and setters
     public int getServiceId() {
         return serviceId;
     }
 
-//    public void setServiceId(int serviceId) {
-//        this.serviceId = serviceId;
-//    }
-
     public String getServiceName() {
         return serviceName;
     }

app/src/main/java/com/example/petstoremobile/models/Supplier.java

@@ -1,5 +1,7 @@
 package com.example.petstoremobile.models;
 
+import com.example.petstoremobile.dtos.SupplierDTO;
+
 public class Supplier {
     private int supId;
     private String supCompany;
@@ -18,16 +20,21 @@ public class Supplier {
         this.supPhone = supPhone;
     }
 
+    public Supplier(SupplierDTO dto) {
+        this.supId = dto.getSupId().intValue();
+        this.supCompany = dto.getSupCompany();
+        this.supContactFirstName = dto.getSupContactFirstName();
+        this.supContactLastName = dto.getSupContactLastName();
+        this.supEmail = dto.getSupEmail();
+        this.supPhone = dto.getSupPhone();
+    }
+
     //getter and setters
 
     public int getSupId() {
         return supId;
     }
 
-//    public void setSupId(int supId) {
-//        this.supId = supId;
-//    }
-
     public String getSupCompany() {
         return supCompany;
     }

app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <base-config cleartextTrafficPermitted="true">
+        <trust-anchors>
+            <certificates src="system" />
+        </trust-anchors>
+    </base-config>
+</network-security-config>